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A Highway Travel Information System: Forecasting and Publicizing Delays in the Indiana State Highway Network

机译：公路旅行信息系统：印第安纳州立高速公路网中的延误预报和公布

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The Highway Travel Information System (HTIS) is a long-term pre-trip information system providing information about expected events, such as road construction. The HTIS can be beneficial to both highway travelers and roadway project schedulers. Project schedulers can use the HTIS to check the forecasted traffic impacts of a proposed construction project schedule. If the schedule would cause unacceptable delays, a scheduler can try new schedules to reduce the delay. Travelers who have flexible schedules and would like to do pre-trip planning can obtain knowledge of traffic conditions in the near future from HTIS to avoid unnecessary delays. An approach called Workzone Delay Equilibrium Estimation (WDEE) is used by the HTIS to predict traffic conditions as construction zones age. Two extreme values of link volumes are calculated based on two scenarios: “no information”, in which no drivers know about a new road capacity reduction, and “complete information”, in which all drivers have adequate information about road construction zones. A relationship between link volumes and the age of a construction project has been hypothesized and applied to the two extreme cases to estimate link volumes during construction periods. Finally, the expected delays on links under construction are estimated based on the estimated link volumes. The HTIS is divided into three subsystems for the purpose of meeting the needs of different groups of users. They are the modeling, project scheduling, and web access subsystems. The modeling and project scheduling subsystems are for management purposes and the web access subsystem is for use by the traveling public. The modeling subsystem is built using Excel VBA and TransCAD GISDK interfaces. The main function of the modeling subsystem is to model traffic conditions and generate a delay database. The project scheduling subsystem is built on the TransCAD GISDK interface. The major tasks for the project scheduling subsystem include schedule database management and assisting project scheduling. The web access subsystem is built on several scripting languages, including Hyper Text Markup Language (HTML), JavaScript, VB-script, and Active Server Pagers (ASP). With the web access subsystem, travelers may input their proposed departure times and receive information about expected delays at workzones that are expected to be active during their trips. Motorists can use the information to plan their trips up to two months in advance.
机译：公路旅行信息系统（HTIS）是一个长期的出行前信息系统，可提供有关预期事件（如道路建设）的信息。 HTIS对高速公路旅行者和道路项目调度程序都有利。项目计划程序可以使用HTIS来检查拟议的建设项目计划的预计交通影响。如果计划将导致不可接受的延迟，则计划程序可以尝试新的计划以减少延迟。行程安排灵活且希望进行行程前计划的旅行者可以在不久的将来从HTIS获取交通状况的知识，以避免不必要的延误。 HTIS使用一种称为“工作区延迟平衡估计”（WDEE）的方法来预测施工区域老化时的交通状况。根据两种情况计算出链路量的两个极值：“无信息”（其中没有驾驶员知道新的道路通行能力降低）和“完整信息”（所有驾驶员具有关于道路建设区的足够信息）。假设了连接量与建设项目的使用年限之间的关系，并将其应用于两个极端情况以估算施工期间的连接量。最后，根据估计的链路量来估计在建链路的预期延迟。为了满足不同用户群的需求，HTIS分为三个子系统。它们是建模，项目计划和Web访问子系统。建模和项目计划子系统用于管理目的，而Web访问子系统则用于旅行的公众。建模子系统是使用Excel VBA和TransCAD GISDK接口构建的。建模子系统的主要功能是对交通状况进行建模并生成延迟数据库。项目计划子系统建立在TransCAD GISDK接口上。项目计划子系统的主要任务包括计划数据库管理和协助项目计划。 Web访问子系统基于几种脚本语言构建，包括超文本标记语言（HTML），JavaScript，VB脚本和Active Server Pagers（ASP）。借助网络访问子系统，旅行者可以输入建议的出发时间，并在预计会在旅途中活跃的工作区接收有关预期延迟的信息。驾驶者可以使用该信息提前两个月计划行程。

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